/**
* Attach a command to the chain
*
* The priority parameter can be used to override the command priority while enqueueing the command.
*
* @param KCommandInterface $command
* @param integer $priority The command priority, usually between 1 (high priority) and 5 (lowest),
* default is 3. If no priority is set, the command priority will be used
* instead.
* @return \KCommandChain
* @throws InvalidArgumentException if the object doesn't implement KCommandInterface
*/
public function enqueue(KObjectHandlable $command, $priority = null)
{
if (!$command instanceof KCommandInterface) {
throw new InvalidArgumentException('Command needs to implement KCommandInterface');
}
$priority = is_int($priority) ? $priority : $command->getPriority();
return parent::enqueue($command, $priority);
}
